package 力扣题库;

public class TreeNode {
        public int val;
        public TreeNode left;
        public TreeNode right;
        public TreeNode() {}
        public TreeNode(int val) { this.val = val; }
        public TreeNode(int val, TreeNode left, TreeNode right) {
            this.val = val;
            this.left = left;
            this.right = right;
        }

}
